Kinetic energy as a function of time

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SUMMARY

The discussion centers on calculating kinetic energy as a function of time using the relationship between force, mass, and acceleration. The user initially derived acceleration by dividing force by mass and substituted acceleration with the derivative of velocity over time (dv/dt). After integrating to find velocity as a function of time, the user encountered discrepancies with expected answers but ultimately identified and corrected their mistake, leading to the correct kinetic energy calculation.

PREREQUISITES
  • Understanding of Newton's Second Law (Force = mass x acceleration)
  • Knowledge of calculus, specifically integration and differentiation
  • Familiarity with the concept of kinetic energy (KE = 0.5 * m * v^2)
  • Basic physics principles regarding motion and forces
NEXT STEPS
  • Study the derivation of kinetic energy from first principles in classical mechanics
  • Learn about the integration techniques used in physics, particularly for motion equations
  • Explore the relationship between force, mass, and acceleration in more complex systems
  • Investigate common mistakes in physics calculations and how to avoid them
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Students of physics, educators teaching mechanics, and anyone interested in understanding the mathematical foundations of motion and energy calculations.

Prabs3257
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Homework Statement
a particle of mass m is subjected to a force F=F°(cos(t)i+sin(t)j) if initially the particle was at rest the kinetic energy of the particle as a function of time is fgiven by
Relevant Equations
a=dv/dt
I got acceleration by dividing force by m then replaced a by dv/dt and then integrated it to get velocity as a fxn of time and hence got kinetic energy but problem is my ans does not match with any option can someone please compare their ans
 

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Can you show us what you did?
 
PeroK said:
Can you show us what you did?
 

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What velocity do you get at ##t=0##?
 
PeroK said:
What velocity do you get at ##t=0##?
Ya i got my mistake and got the ans thanks
 
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